We’re integrating embedded analytics into our customer portal using Snowflake 7.0 and encountering authorization failures when calling the MCP server endpoints. The API calls work fine in our dev environment but fail in production with 403 errors.
The error specifically mentions insufficient permissions for dynamic endpoint access. We’ve configured service principal roles and API scope parameters, but something isn’t mapping correctly. Our authentication token is valid (verified via separate test), but the MCP server rejects requests to certain analytics data blocks.
Has anyone dealt with MCP dynamic endpoint permissions in embedded scenarios? We’re using OAuth2 with client credentials flow and need to understand how service principal role mapping works with API scope parameters.
You need to assign the MCP role through the API management interface under Service Principals > Role Assignments. Look for mcp.analytics.executor role - that’s what grants access to dynamic endpoints. Also, make sure your OAuth client has the mcp_server resource listed in its allowed resources array. The prod environment likely has stricter role inheritance rules than dev.
Are you using the correct API scope format? For embedded analytics in Snow 7.0, the scope should be analytics:embed:read plus the specific data block identifier. Also verify that your OAuth client registration includes the MCP server as an authorized resource. The service principal role mapping requires both the API gateway role AND the MCP-specific role to be assigned.
Thanks for the responses. I checked our scope parameters and they look correct. However, I noticed our service principal only has the API gateway role assigned. Where do I configure the MCP-specific role? Is this in the Snowflake admin console or through the API management interface?
One thing to watch out for: MCP dynamic endpoint permissions are cached for 15 minutes after role changes. If you just added the MCP role, wait a bit and try again. Also verify that your analytics data blocks are registered in the MCP endpoint catalog with the correct access control list. Sometimes the block exists but isn’t properly registered for external API access.
I’ve seen this before. The MCP server has a separate permission layer for dynamic endpoints that doesn’t inherit from your standard API roles. Check if your service principal has explicit grants for the analytics data blocks you’re accessing. The scope parameter needs to match exactly what’s registered in the MCP endpoint catalog.